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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <syslog.h>
#include <stdlib.h>
#include "private/libc_logging.h"
static const char* syslog_log_tag = NULL;
static int syslog_priority_mask = 0xff;
void closelog() {
}
void openlog(const char* log_tag, int /*options*/, int /*facility*/) {
syslog_log_tag = log_tag;
}
int setlogmask(int new_mask) {
int old_mask = syslog_priority_mask;
// 0 is used to query the current mask.
if (new_mask != 0) {
syslog_priority_mask = new_mask;
}
return old_mask;
}
void syslog(int priority, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
vsyslog(priority, fmt, args);
va_end(args);
}
void vsyslog(int priority, const char* fmt, va_list args) {
// Check whether we're supposed to be logging messages of this priority.
if ((syslog_priority_mask & LOG_MASK(LOG_PRI(priority))) == 0) {
return;
}
// What's our log tag?
const char* log_tag = syslog_log_tag;
if (log_tag == NULL) {
log_tag = getprogname();
}
// What's our Android log priority?
priority &= LOG_PRIMASK;
int android_log_priority;
if (priority < LOG_ERR) {
android_log_priority = ANDROID_LOG_ERROR;
} else if (priority == LOG_WARNING) {
android_log_priority = ANDROID_LOG_WARN;
} else if (priority <= LOG_INFO) {
android_log_priority = ANDROID_LOG_INFO;
} else {
android_log_priority = ANDROID_LOG_DEBUG;
}
__libc_format_log_va_list(android_log_priority, log_tag, fmt, args);
}
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